hibernate 查询没法排序

hibernate 查询无法排序

hql="from AskBuy as a where a.userID = ? order by ? desc ";Query query=session.createQuery(hql);query.setParameter(0, userId);                  query.setParameter(1,time);query.setMaxResults(5);

hql="from AskBuy as a where a.userID = ? order by time desc ";Query query=session.createQuery(hql);query.setParameter(0, userId);query.setMaxResults(5);